Global Patent Index - EP 1357382 A1

EP 1357382 A1 20031029 - Method and system for determining a property of a pavement by measuring natural gamma radiation

Title (en)

Method and system for determining a property of a pavement by measuring natural gamma radiation

Title (de)

Verfahren und System zur Bestimmung der Eigenschaft eines Strassenbelags durch Messung der natürlichen Gammastrahlung

Title (fr)

Méthode et système pour déterminer une propriété d'une chaussée par détection du rayonnement gamma naturel

Publication

EP 1357382 A1 20031029 (EN)

Application

EP 02076684 A 20020426

Priority

EP 02076684 A 20020426

Abstract (en)

For detecting a property of at least one layer (301) of a pavement (300), a flux of radiation received from the pavement is measured in a position above the pavement. The measured radiation includes gamma -radiation emitted by at least one radionuclide in or under the pavement. Information regarding the property is determined from the measured flux and a relationship between at least one flux of gamma -radiation emitted by the at least one radionuclide and the property. Pavement layers typically contain different concentrations of gamma -radiation emitting radionuclides than the roadbed or the soil underneath and this also apply to layers of pavement of different material compositions. This allows to determine information regarding properties of the pavement from measured gamma -radiation intensity. <IMAGE>

IPC 1-7

G01N 33/42; G01N 23/06; G01V 5/02; G01B 15/02

IPC 8 full level

G01B 15/02 (2006.01); G01N 23/06 (2006.01); G01N 33/42 (2006.01); G01V 5/02 (2006.01)

CPC (source: EP US)

G01N 33/42 (2013.01 - EP US); G01V 5/02 (2013.01 - EP US); G01N 2223/01 (2013.01 - EP US)

Citation (search report)

  • [YA] US 4525854 A 19850625 - MOLBERT JOHN L [US], et al
  • [A] GB 1179172 A 19700128 - INDUSTRIAL NUCLEONICS CORP [US]
  • [A] WO 0203055 A2 20020110 - TROXLER ELECTRONIC LAB INC [US], et al
  • [XY] DATABASE WPI Section PQ Week 199146, Derwent World Patents Index; Class Q41, AN 1991-338269, XP002216256
  • [DY] HENDRIKS P H G M ET AL: "Full-spectrum analysis of natural gamma -ray spectra", JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 2001, ELSEVIER, UK, vol. 53, no. 3, pages 365 - 380, XP002216255, ISSN: 0265-931X

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1357382 A1 20031029; AU 2003224512 A1 20031110; EP 1499884 A1 20050126; US 2006000972 A1 20060105; US 7235780 B2 20070626; WO 03091726 A1 20031106

DOCDB simple family (application)

EP 02076684 A 20020426; AU 2003224512 A 20030428; EP 03721164 A 20030428; NL 0300313 W 20030428; US 51199505 A 20050815